Changes in the antioxidative enzyme activities and lipid peroxidation in wheat seedlings exposed to cadmium and lead stress

By S. K. Dey, Jayashree Dey, Sanjukta Patra, Debasmita Pothal. 2007

142 citations recorded by the source corpus.

Wheat seedlings were grown in presence of CdCl2 (0-200 µM) and Pb(NO3)2 (0-2000 µM) separately. The growth of metal-treated seedlings was significantly depressed. The activities of antioxidative enzymes namely superoxide dismutase (SOD), catalase (CAT) and guaiacol peroxidase (POX) were altered both in root and shoot tissues of 7-d-old seedlings. Under Cd stress, SOD activity in roots was undetectable even at the lowest Cd concentration (50 µM) whereas in shoots it declined sharply with increasing Cd levels. The activity of CAT declined to a greater extent in roots than in shoots. Even though the POX activity increased nine times in shoots, a decreasing trend was observed in root tissues due to Cd stress. Under Pb stress, the induction in SOD activity and decline in CAT activity were sharper in root tissues than in their shoot counterparts. The POX activity increased both in roots and shoots under Pb stress. Malondialdehyde concentration increased in both roots and shoots of Cd- and Pb-treated seedlings. The results suggest that metal toxicity was associated with oxidative stress. The decline in CAT activity may be the probable reason behind the Cd- and Pb-induced oxidative stress, since the alterations in SOD and POX activities showed different trends under these metal stresses.

Subfields: Analytical Chemistry, Plant Science, Pollution

View Paper: https://www.semanticscholar.org/paper/cfe6450ef516a4c1c2d61c06af07750fdb6ff106

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Plant Science

1. R. Pandey
2. Dharmendra Kumar Pandey
3. G. C. Pathak
4. E. Pinelli
5. M. Shahid
6. N. Pandey
7. C. Dumat
8. B. Pourrut

In Pollution

1. R. Pandey
2. Dharmendra Kumar Pandey
3. G. C. Pathak
4. N. Pandey

Citations in the corpus

• Lead uptake, toxicity, and detoxification in plants. (2011, background): “Plants combat lead-induced increased production of ROS by activating various antioxidant enzymes.”
• Heavy metals, Co, Ni, Cu, Zn and Cd, produce oxidative damage and evoke differential antioxidant responses in spinach (2009, background): “…to membrane lipids, has been reported earlier in the case of Co (Li et al., 2005), Ni (Rao and Sresty, 2000; Pandey and Pathak, 2006), Cu (Mazhoudi et al., 1997; Lombardi and Sebastiani et al., 2005), Zn (Chaoui et al., 1997; Rao and Sresty, 2000) and Cd (Chaoui et al., 1997; Dey et al., 2007).”